1. Attenuation of rod stress in percussive long-hole drilling;Fukui;JMMIJ,2007
2. Drillability of percussion bits in three types of rock;Karasawa;JMMIJ,2011
3. Study on impact penetration test of rock;Okubo;JMMIJ,1992
4. Performance evaluation of PDC percussion bits and calculation of total drilling costs;Ohno;JMMIJ,2014
5. The current state of PDC bit technology;Bellin;World Oil,2010